New windows and doors improve comfort, cut energy bills and add long-term value to your home. Juniper Windows Ventura pairs proven product lines with our own installing crews for lasting performance - and a price we put in writing.
Choose your installer
The unit is half the job - the install is the other half. Our own background-checked crews measure, set, seal and insulate every opening, and they know the lines we quote inside and out because they install them every week.
Select the right products
Compare styles, materials and glass packages side by side until the fit is right for your rooms, your budget and your goals. The product-line comparison below is the place to start.
Prepare your home for install
Before install day we walk you through a short checklist - furniture pulled back, treatments down, a clear path to each opening - so install day is watch-it-happen, not scramble.
Compare the Lines We Quote
Every project is priced on the same lines, side by side - the price indicators below are relative, and your consultant shows exact numbers on your actual openings.
PGTThe line Florida homeowners arrive naming - the most Miami-Dade certifications in the industry$$$
- More Miami-Dade NOA certifications than any other line we quote
- WinGuard, EnergyVue and ClassicVue Max systems built for every wind zone
- 99% on-time delivery keeps your install date on the calendar
CGIThe heavyweight impact line$$$$$
- Large-missile impact ratings for the strictest wind zones
- Architectural-grade aluminum with commercial-depth frames
- The line we quote when protection is the whole point
CWSThe Florida value pick$$
- Vinyl systems built in Florida for Florida codes
- Strong energy packages at the friendliest price point
- The smart start for whole-home replacements on a budget
ESWSlim lines, big glass$$$$
- Narrow-sightline aluminum for modern elevations
- Oversized openings and floor-to-ceiling glass
- Impact-rated without the bunker look
ECOThe aluminum impact workhorse$$$
- Miami-built aluminum impact systems
- A strong price-to-protection ratio for coastal homes
- Proven inventory lines with short lead times
Fast, Reliable Door Replacement Across Simi Valley
Door replacement in Simi Valley runs anywhere from $1,850 for a basic steel entry door to $7,500+ for a high-end fiberglass patio slider with impact-rated glass and a full re-flash. That spread exists because homes here, especially the 1960s and 70s tract builds east of the 118, hide framing problems behind old stucco. You won’t know the real number until the old door comes out. Our crews work Simi Valley every week, so we know what’s behind those walls and we price for it in writing before we cut anything. Call (559) 314-1305 to get a real number for your street, not a national average.
Why Juniper Windows Ventura Is Simi Valley’s Preferred Door Replacement Company
Juniper Windows Ventura, part of the Relay Home Co. family since 2001, sends background-checked, uniformed technicians to Simi Valley job sites with one goal: a written price before a single screw turns. Our customers in neighborhoods like Wood Ranch, Santa Susana Knolls, and the east-side tracts near Royal Avenue keep calling us back because we show up when we say we will and the number on the contract is the number on the invoice. The 365-Day Done Right Promise covers parts and labor for a full year after installation, in writing.
Sean Mackey leads the team that coordinates Simi Valley scheduling and dispatch from our Los Angeles office, but the crews serving Simi Valley are local, which means a door in the foothills near Long Canyon or a slider in a cul-de-sac off Erringer Road gets measured and installed by someone who knows exactly how Santa Ana wind loads those openings. We don’t send a salesperson to “estimate” and a different crew to install. The technician who measures is the technician who installs, and that continuity shows in the fit and finish.
Door Installers in Simi Valley
Door installers in Simi Valley handle more than sliding a new pre-hung unit into an old rough opening. On paper, a door replacement means removing the existing slab and frame, shimming and leveling the new frame, insulating the jamb cavity, re-fastening through stucco to the studs, re-flashing, and trimming the interior. In Simi Valley’s 1960s and 70s tract homes, it usually also means squaring an opening that has settled, replacing rotted jamb legs, and addressing building paper that has turned to dust. A straight replacement on a standard 3/0 entry door here typically lands between $2,200 and $3,900, including the door, installation, and basic weatherproofing. If the opening needs re-framing, expect $4,200 to $6,800.
Pre-hung entry door installation
We remove the old frame to the studs, correct any out-of-square condition, and set the new frame with composite shims before back-filling the jamb with low-expansion foam. Stucco-exterior homes in Simi Valley need the exterior casing re-flashed under the existing paper, not caulked over it. That detail is where budget installs fail.
Sliding patio door replacement
Sliders in Simi Valley take the most abuse from dust and wind, and original aluminum units rarely have a thermal break. We replace them with dual-pane, low-E sliders or French-style hinged doors with impact-rated glazing where the foothills demand it, and we re-support the header before cutting anything. Expect $3,200 to $7,500 depending on glazing and whether the rough opening needs structural correction.
Door Contractors in Simi Valley
Door contractors in Simi Valley operate differently from handymen who swap a slab and call it done. We pull permits when the opening is load-bearing, when glazing changes, or when the city inspector will flag a code upgrade. Simi Valley’s building department requires tempered glass in doors adjacent to swing paths and updated smoke and carbon monoxide detectors once an opening is altered, and our written quotes include those upgrades as line items. A permitted door replacement with re-flashing and stucco repair typically runs $3,400 to $5,900 for a single exterior door in Simi Valley. Non-permitted slab changes on interior doors run less, around $850 to $1,600.
Permit-triggered code upgrades
Any exterior door replacement that changes glazing area or involves structural work is a code event in Simi Valley. We include the permit fee, the inspection coordination, and the detector upgrades in the written quote. No surprise line items after the fact because we write the allowance before we start.
Stucco repair and re-flashing
Cutting stucco back to access the rough opening leaves a repair line that must be patched and textured to match. Our crews re-flash with modern sill pan and J-channel before the stucco goes back, so winter rain hits a barrier, not your subfloor. This is standard on our Simi Valley exterior door jobs, not an add-on.
Trusted Brands We Service in Simi Valley
We stock and install Therma-Tru, ViewLux, PGT, and CGI product lines, which covers everything from a steel entry slab off the shelf at a Simi Valley supplier’s price to a custom impact-rated slider for a foothills home in Wood Ranch. ViewLux and Therma-Tru get specified most often here because their low-E glass packages handle Simi Valley’s high solar heat gain without turning the interior into a dark box. We keep common jamb widths, sill pans, and weatherstripping on our trucks for Simi Valley service calls, which means a warped or binding door can often be tuned the same visit instead of waiting on a warehouse order.
Common Door Replacement Problems We See in Simi Valley Homes
- Out-of-square rough openings. After 40+ years, the headers on east-side tract homes have settled, so we shim and re-frame before the new door goes in. Skipping this is why cheap replacements bind within two seasons.
- Rotting jamb legs from Santa Ana-driven dust and winter rain. The original building paper behind stucco fails silently, and water wicks into the bottom of the jamb. We expose and replace rotted framing before it spreads to the subfloor.
- Original single-pane aluminum sliders that whistle in wind. Wood Ranch and hillside homes get the worst of the gusts, and those old sliders have no thermal break and no compression seal left. Weatherstripping stops the whistle temporarily, but the glass is the real problem.
- Stucco walls hiding missing sill pan flashing. Many 1960s and 70s Simi Valley builds went in without proper sill pans, so water runs under the threshold. We install a modern sill pan and back-dam on every exterior door we touch.
Pricing for Door Replacement in Simi Valley, CA
Here are real numbers for Simi Valley, based on what we quote and install in this city every month. A standard steel entry door replacement runs $1,850 to $3,200. A fiberglass entry door with low-E glazing sits between $2,800 and $4,600. Patio sliders, the most common replacement in Simi Valley, land between $3,200 and $7,500, with impact-rated PGT or CGI units on the upper end. The factors that move a Simi Valley quote: whether the rough opening needs re-framing, whether the existing opening is stucco and needs re-flashing, and whether the city permit triggers detector or glazing upgrades. Our estimate is free, and the price we give you is the price you pay because we write it before we open the wall. Call (559) 314-1305 to schedule yours.
We Also Serve Cities Near Simi Valley
Our Door Replacement crews cover the surrounding Ventura County corridor, including Moorpark, Newbury Park, Fillmore, and Somis. If you’re in one of those cities and comparing quotes, the same written-price standard applies. You’ll get a real number before work starts, not an estimate that shifts. See our Door Replacement in Simi Valley page for specifics on how we handle the hidden framing and flashing issues common to this area’s housing stock.
Serving Simi Valley, CA - Our Local Coverage Area
We’re based in the Simi Valley area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Door Replacement in Simi Valley
Because the original rough opening is rarely square or flashed correctly, and you cannot see that until the old frame is out. We handle it by including a written allowance for shimming, re-framing, and re-flashing in every Simi Valley exterior door quote. If we find rot or settle, we photograph it, show you, and price the correction in writing before we proceed. You never pay for a surprise without approving it first. Call (559) 314-1305 and we will walk you through what your wall likely holds.
Yes, in most cases. Simi Valley’s building code treats an exterior slider replacement as an alteration that can trigger glazing requirements, tempered glass near swing paths, and updated smoke and carbon monoxide detector requirements. We include permit fees and inspection coordination in the written quote, and we do not skip it to make a number look lower. A failed final inspection costs more than the permit ever did.
Wind loads near the foothills push against the entire door plane, not just the panel, so the frame anchoring and jamb shimming matter more than the door slab itself. We anchor through stucco into the studs, back-fill the jamb with foam, and use compression weatherstripping that holds under negative pressure. Homes in Wood Ranch get impact-rated glazing when the exposure warrants it. We would rather over-build a foothills opening than return in two years for a whistling door.
Replace them. A single-pane aluminum slider from the 1960s or 70s has no thermal break, which means it conducts heat straight into your house all summer, and no compression seal left, which means dust and Santa Ana wind come through all year. Repairing the rollers and adding weatherstripping might buy a season, but the frame itself is the problem. A dual-pane low-E replacement pays back in comfort and energy use, and we can typically quote it in one visit.
Therma-Tru low-E insulated fiberglass doors with impact-rated glazing are our most common spec for Simi Valley’s older tract homes, because they square up well in rough openings that have settled and they handle the valley’s heat load without heavy maintenance. For homes near the foothills where wind exposure is higher, we move to PGT or CGI impact-rated systems. The brand choice follows your wall and your wind, not the other way around.
On a door replacement in Wood Ranch, our crew pulled the old aluminum slider and found the rough opening had settled a full 3/4 inch out of square, with the original J-channel flashing corroded through. We re-framed the jamb, installed a Therma-Tru low-E insulated fiberglass door with impact-rated glazing, and re-flashed the opening before stucco repair, all changes priced and approved in writing under the contract allowance the homeowner had seen before we started. That is how a Simi Valley door replacement should go, with the hidden problems written into the deal before the wall is open.
Written by Sean Mackey, Owner at Juniper Windows Ventura, serving Simi Valley with written-price door replacement since 2001.
Six Reasons Homeowners Choose Juniper Windows Ventura
Laminated glass and reinforced frames hold up to wind-driven rain, hail and flying debris, so your openings stay sealed when the weather turns.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Tighter seals and insulated glass even out hot and cold rooms and stop the drafts at the frame.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.